Optima Blue Top D31M Marine Battery 12 V Deep Cycle Boat Stereo Multi Purpose
Battery Model: D31M Part Number: 8052-161 Nominal Voltage: 12 volts NSN: 6140 01 502 4405 Description: High power, dual purpose engine start and deep cycle, sealed lead acid battery
Physical Characteristics: Plate Design: High purity lead-tin alloy. Wound cell configuration utilizing proprietary SPIRALCELL® technology. Electrolyte: Sulfuric acid, H2SO4 Case: Polypropylene Color: Case: Light Gray Cover: “OPTIMA” Blue Group Size: BCI: 31 Standard Metric Length: 12.774” 324.46 mm Width: 6.529” 165.84 mm Height: 9.370” 238.00 mm (Height at the top of terminals) Weight: 59.8 lb 27.1 kg
Performance Data: Open Circuit Voltage (Fully charged): 13.1 volts Internal Resistance (Fully charged): .0025 ohms Capacity: 75 Ah (C/20) Reserve Capacity: BCI: 155 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off) Power: CCA (BCI 0°F): 900 amps MCA (BCI 32°F): 1125 amps Recommended Charging: The following charging methods are recommended to ensure a long battery life: (Always use a voltage regulated charger with voltage limits set as described below.) Model: D31M These batteries are designed for starting and deep cycle applications and for use in vehicles with large accessory loads.
Recommended Charging Information: Alternator: 13.65 to 15.0 volts Battery Charger (Constant Voltage): 13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate Float Charge: 13.2 to 13.8 volts; 1 amp maximum; (indefinite time at lower voltages) Rapid Recharge: Maximum voltage 15.6 volts. No current limit as long as battery (Constant voltage charger) temperature remains below 125°F (51.7°C). Charge until current drops below 1 amp. Cyclic or Series String Applications: 14.7 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 3 amp constant current for 1 hour. All limits must be strictly adhered to. Recharge Time: (example assuming 100% discharge – 10.5 volts) Current Approximate time to 90% charge 100 amps 52 minutes 50 amps 112 minutes 25 amps 210 minutes
Recharge time will vary according to temperature and charger characteristics. When using Constant Voltage chargers, amperage will taper down as the battery becomes recharged. When amperage drops below 1 amp, the battery will be close to a full state of charge.
(All charge recommendations assume an average room temperature of 77°F (25°C). Always wear safety glasses when working with batteries. Always use a voltage regulated battery charger with limits set to the above ratings. Overcharging can cause the safety valves to open and battery gases to escape, causing premature end of life. These gases are flammable! You cannot replace water in sealed batteries that have been overcharged. Any battery that becomes very hot while charging should be disconnected immediately.
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